Insulator



March 30 1926.

M. F. H.l GOUVERNEUR INSULATOR i Filed July 29, 1919 @uvam toz -M/GMW Patented Mar. 30, 1926.

UNITED STATES PATENT l"orifice MINOR F. H. GOUVERNEUR, OF ROCHESTER, NEW YORK, ASSIGNOR, BY VIlVIESNE AS- y,

SIGNMENTS, T0 LOCKE INSULATOR CORPORATION, 0F BALTXMORE, MARYLAND,

A CORPORATION OF MARYLAND.

-.Application filed .Tilly 29, 1919. Serial No. 313,976.

T0 all whom it mag/concern:

Be it known that I, MINOR F. H. GroUv- ERNEUR, a citizen of the United States, residing at Rochester, in the. county of Monroeand State of New York, have invented certain new and useful Improvements inlnsulators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to insulators for use'in connection with transmission lines for high voltage currents, and more particularly to new and improved means for eectively connecting the eye-bolts .or equivalent fastening means to suspension insulator units.

To this end the principal object of my invention, broadly stated, is to provide a strong and reliable means for connectlng eye-bolts to the porcelain of insulators, said means comprising a metallic member connected to said eye-bolt and adapted to be entered within the bolt receiving socket of an insulator and then enlarged so as to prevent the withdrawal o-f the said bolt. l`

Another object of the invention, is to provide an eye-bolt with a hollow cap or thimble of relatively soft metal, said cap or thimble being connected to the eye-bolt so as to extend beyond the end of the same whereby the said cap may be entered within the bore of an insulator adjacent the enlargement therein and means for expanding the said cap or thimble so as to substantially lill the enlarged portion of the said bore, whereby the eye-bolt is interlocked with the insulator.

There are other objects of the invention as will hereinafter appear from the description of the single embodiment of the invention which has been illustrated on the accompanying drawings, in whichn- Figure l is a transverse vertical section through the porcelain and eye-bolt of a suspension insulator unit, showing the invention.

Figure 2 is a.frag1rientary view showing the position of the eye-bolt, and associated cap or thimble with reference to the insulator body before the cap is expanded;

Figure 3 is a view similar to Figure 2, showing the cap in expanded position; and

-1 limiting sense.

Figure 4f is a view, in side elevation, of the eye-bolt and associated cap or thimble. Throughout the. specification. and drawing like parts are designated by like reference limit my invention, since the term is employed. in its descriptive and not in the The numeral l designates the porcelain or body portion of a suspension insulator unit, the said porcelain is preferably provided with a neck or stem 2 having a groove 3, at the juncture of said stein and the skirt portion 4 of the insulator, said groove being adapted to receive the means by which the bell shaped cap (not here shown) is connected to the porcelain body ofthe insulator. Entering from the underside of the skirt portion 4l there is provided a cylindrical bolt receiving socket or bore 5, which is preferably provided adjacent the upper end with an enlargement 6.

The eye-bolt 7 is provided at one end of stem 9 with a hoop or eye 8 and at the other end of the stem there is provided a hollow cap or thimble l0. The said cap may for convenience be formed by brazing or welding a soft metallic bulb to the end of the eye-bolt. `An opening ll in the stem 9 of the said bolt leads to theI interior of the cap 10. The side walls of the said cap are formed of relatively thin metal, so that they will deforin under excessive pressure.

The thimble l0, which is provided with relatively thin side walls, is welded or brazed to the end of the stem 9 of the eye.- bolt 7, the latter having' been previously provided, with an opening leading to the end of the eye-bolt which is surrounded by the thimble. The bolt and associated thimble are entered within the opening 5 of the porcelain until the cap l0 occupies a position within the enlargement 6 of thesaid recess 5. W'hen in this position pressure is applied to the interior ofI the thimble or cap l0 through the hole 1l in the eye-bolt, and the thimble or cap is expanded until it substantially fills the enlargement 6 of the bore or recess 5, care being taken to provide sui'hcient room between the enlarged cap and the walls of the recess to permit of expansion and contraction of the members without bringing pressure to bear on the porcelain. A convenient way to expand the thimble is toapply hydraulic pressure thereto, the opening 1l serving as means to admit the application of pressure to the interior of the thimble.

By the form of connection hereinbefore described, there is provided a permanent connection between the eyebolt and the porcelain. The connection while permanent is, nevertheless, flexible to a high degree and this iiexibility is not obtained either at a sacrifice of strength of porcelain or bolt. By having a space between cap and porcelain I am enabled to obtain the iexible connectionreferred to above and at. the same time I relieve the porcelain of expansion strains from the eye-bolt.

To reinforce the thimble or cap after the same'has been expanded I may iill the cavity within the cap with type metal or other through, one end of which shank is provided with means for engaging a co-acting member, the opposite end of said shank having connected thereto, infiuid-tight relation, an imperiorate, hollow, thin-Walled, softmetal thimble communicating with said tubulature, whereby said bolt is adapted 'for connection with an associated portion by inserting said thimble in a corresponding aperturein said portion and expanding the same. in. place. Y

In testimony whereof I aiiix my signature.

MINOR F. H. GOUVERNEUR. 

